I would welcome a feature to change the loop execution.

What does that mean?
When you play a song and start a loop, the loop is set in that "area" which is not played yet. When you could change the loop execution point, you could loop for example what you heard the last and not as now what you will hear. In DJ-Software as "Virtual Studio" the loop only works how I described it and I think in some situations its much more comfortable.